Re-building the early solar system and cosmo chronology based on the isotope heterogeneity in the protosolar disk

基于原太阳盘同位素异质性重建早期太阳系和宇宙年代学

• 批准号: 22H00170
• 负责人: 飯塚 毅
• 金额: $ 27.21万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-04-01 至 2026-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22H00170/
• 关键词: 初期太陽系年代学; 核宇宙年代学; 超新星; ニュートリノ過程; 原始惑星系円盤; 消滅核種; 年代学; 核合成; 同位体年代学; 原始太陽系円盤; 初期太陽系

本研究は，同位体不均質性に立脚した新たな方法論により，初期太陽系・核宇宙年代学を再構築するものである. 初期太陽系年代学では，消滅核種26Al不均質性とTi安定同位体変動の相関から隕石26Al年代を較正し，初期太陽系イベントの年表を書き換える．核宇宙年代学では，超新星の同一過程で合成される短寿命核種92Nb・98Tcと超長寿命核種138Laの不均質性を結合することで，超新星爆発の年代を高確度で推定し，『超新星爆発が太陽系誕生の引き金』とする仮説を検証する．2022年度には，初期太陽系年代学の研究では，26Al年代が報告されているものの，Ti同位体組成が未知の石質隕石について，Ti同位体分析を進めた．特に，近年見つかった安山岩質隕石EC002や，Asuka-881394を主対象とした．Ti同位体は，試料融解後にTiをイオン交換樹脂で分離し，多重検出器誘導結合プラズマ質量分析計（MC-ICPMS）を用いて測定した．これらの結果と，先行研究の結果を組み合わせることにより，26Al不均質性とTi安定同位体変動の相関式を正確に決定した．核宇宙年代学では本年度，原始太陽系円盤における超新星放出物分布の不均質性を明らかにすべく，隕石試料の高精度La同位体分析を実施する．存在度の低い138Laを高感度・高精度で測定するために，MC-ICPMSに新たに10^13 ohmのファラデーカップ増幅器を導入した．さらに，研究代表者の研究グループで開発してきた３段階La分離法を用いて，隕石試料からLaを分離した．さらに，研究代表者と分担者らがこれまでに明らかにしてきた短寿命核種92Nbの不均質性についての研究成果を論文化し，国際雑誌で発表した．

This study is based on a new methodology based on isotopic heterogeneity and a reconstruction of the chronology of the early solar system and nuclear universe. The chronology of the early solar system is correct, and the 26Al chronology of the early solar system is corrected. Nuclear cosmic chronology, the same process of supernovae, the synthesis of short-lived nuclear species 92Nb・98Tc, and the heterogeneity of ultra-long-lived nuclear species 138Laすることで, the age of the supernova explosion is estimated with high accuracy, "the supernova explosion is the birth of the solar system and the gold is drawn" and the supernova explosion is proved. In 2022, research on the chronology of the early solar system, report on the 26Al chronology, unknown stony meteorite composition of Ti isotopes, and analysis of Ti isotopes. Specially, the andesitic meteorite EC002 has been seen in recent years, and Asuka-881394 is the main target of the meteorite. The Ti isotope was separated by Ti exchange resin after the sample was melted, and the multi-extractor induced coupling mass spectrometer (MC-ICPMS) was used to measure the result. The result of the preliminary study is the combination of the results of the preliminary study, and the correlation formula of the 26Al inhomogeneity and Ti stable isotope movement is correct and determined. This year's nuclear cosmic chronology, the original solar system's disk, the heterogeneity of supernova emission distribution, and the high-precision La isotope analysis of meteorite samples. Presence of low 138La high sensitivity and high precision measurement, MC-ICPMS new 10^13 ohm high sensitivity and high precision amplifier introduction.さらに, the research representative of のグループで开発してきた3-stage La separation method いて, the meteorite sample からLaをseparation した. Sugaru, the research representative and co-contributor of Sugaru Ming's short-lived nuclear species 92Nb's inhomogeneity is a research result of the culture, and the international journal is a table.

项目成果

Evidence for Enrichment of Niobium-92 in the Outer Protosolar Disk

原太阳外盘中铌 92 富集的证据

• DOI: 10.3847/2041-8213/acab5d
• 发表时间: 2023
• 期刊: The Astrophysical Journal Letters
• 作者: Hibiya T.;Iizuka T.;Enomoto;H.;Hayakawa;T.
• 通讯作者: T.

太陽系最古のジルコノライト

太阳系中最古老的锆英石

• 发表时间: 2022
• 作者: Hopp Timo;Dauphas Nicolas;Abe Yoshinari;Aleon Jerome;O’D. Alexander Conel M.;Amari Sachiko;Amelin Yuri;Bajo Ken-ichi;Bizzarro Martin;Bouvier Audrey ... Yabuta Hikaru ... et al.;佐久間盾，浅沼尚，高畑直人，飯塚毅
• 通讯作者: 佐久間盾，浅沼尚，高畑直人，飯塚毅

Presolar Stardust in Asteroid Ryugu

• DOI: 10.3847/2041-8213/ac83bd
• 发表时间: 2022-08-01
• 期刊: ASTROPHYSICAL JOURNAL LETTERS
• 影响因子: 7.9
• 作者: Barosch, Jens;Nittler, Larry R.;Yurimoto, Hisayoshi
• 通讯作者: Yurimoto, Hisayoshi

The Solar System calcium isotopic composition inferred from Ryugu samples

• DOI: 10.7185/geochemlet.2238
• 发表时间: 2022-10-19
• 期刊: GEOCHEMICAL PERSPECTIVES LETTERS
• 影响因子: 4.9
• 作者: Moynier, F.;Dai, W.;Yurimoto, H.
• 通讯作者: Yurimoto, H.

Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites

• DOI: 10.1126/science.abn7850
• 发表时间: 2022-06
• 期刊: Science
• 影响因子: 56.9
• 作者: T. Yokoyama;K. Nagashima;I. Nakai;E. Young;Yoshinari Abe;J. Aléon;C. Alexander;S. Amari;Y. Amelin;K. Bajo;M. Bizzarro;A. Bouvier;R. Carlson;M. Chaussidon;B.-G. Choi;N. Dauphas;A. Davis;T. Di Rocco;W. Fujiya;R. Fukai;I. Gautam;M. Haba;Y. Hibiya;H. Hidaka;Hisashi Homma;P. Hoppe;G. Huss;K. Ichida;T. Iizuka;T. Ireland;A. Ishikawa;Motoo Ito;S. Itoh;N. Kawasaki;N. Kita;K. Kitajima;T. Kleine;S. Komatani;A. Krot;Ming‐Chang Liu;Y. Masuda;K. McKeegan;M. Morita;K. Motomura;F. Moynier;A. Nguyen;L. Nittler;M. Onose;A. Pack;Changkun Park;L. Piani;L. Qin;S. Russell;N. Sakamoto;M. Schönbächler;L. Tafla;Haolan Tang;K. Terada;Y. Terada;T. Usui;S. Wada;M. Wadhwa;R. Walker;K. Yamashita;Q. Yin;S. Yoneda;Hiroharu Yui;A. Zhang;H. Connolly;D. Lauretta;Tomoki Nakamura;H. Naraoka;T. Noguchi;R. Okazaki;K. Sakamoto;H. Yabuta;M. Abe;M. Arakawa;A. Fujii;M. Hayakawa;N. Hirata;N. Hirata;R. Honda;C. Honda;S. Hosoda;Y. Iijima;H. Ikeda;M. Ishiguro;Y. Ishihara;T. Iwata;K. Kawahara;S. Kikuchi;K. Kitazato;K. Matsumoto;M. Matsuoka;T. Michikami;Y. Mimasu;A. Miura;T. Morota;S. Nakazawa;N. Namiki;H. Noda;R. Noguchi;N. Ogawa;K. Ogawa;T. Okada;C. Okamoto;G. Ono;M. Ozaki;T. Saiki;N. Sakatani;H. Sawada;H. Senshu;Y. Shimaki;K. Shirai;S. Sugita;Y. Takei;H. Takeuchi;Satoshi Tanaka;E. Tatsumi;F. Terui;Y. Tsuda;R. Tsukizaki;K. Wada;Sei‐ichiro Watanabe;M. Yamada;T. Yamada;Yukio Yamamoto;H. Yano;Y. Yokota;Keisuke Yoshihara;M. Yoshikawa;K. Yoshikawa;S. Furuya;K. Hatakeda;T. Hayashi;Y. Hitomi;K. Kumagai;Akiko Miyazaki;A. Nakato;M. Nishimura;H. Soejima;A. Suzuki;T. Yada;D. Yamamoto;K. Yogata;M. Yoshitake;S. Tachibana;H. Yurimoto